METaullICS CarTrIdgE FIlTEr (MCF®)
SuPErIOr FIlTraTIOn FOr wrOughT aluMInuM CaSTErS Metaullics
The bonded-particle cartridge filter is AdvAntAGes
growing in popularity with foundry • Excellent filtration efficiency for high-
managers world-wide. The Metaullics value end products.
Cartridge Filter offers wrought
• Multiple design configurations to meet
aluminium casters the ultimate in
different customer process requirements.
filtration capability for producing high
value-added end products in such • Finest filter pore size available.
quality demanding areas as can stock, • Creates significant metal quality
foil, litho sheet, memory disc, bright improvements over other filtration
trim and aircraft components. processes.
• Proven technology in use for more
Cartridge filter technology is based on
than 30 years - an original Metaullics
the same concept as employed in heat
transfer: establishing a high surface area in the smallest possible footprint - in
this case, a high filter media surface. For molten metal filtration capability, the
high surface area afforded by the cartridge tube bundle permits a much finer
filter media to be employed for a given casting flow rate. This results in very
high filtration efficiency compared to other filter devices. The finest grade filters
are fully capable of removing virtually all particulates down to 5 microns*.
MCF filter tubes consist of controlled size aluminia particulate and a
proprietary molten aluminium resistant binder. Metaullics Cartridge Filter tubes
and assemblies are produced to exacting standards with full compositional
verification on all raw materials and full traceability on manufacturing process
steps. Complete dimensioning, visual inspection, strength and lot permeability
testing assure you'll receive the highest quality; Metaullics systems is certified
to ISO 9001: 2000 standards.
The MCF tube bundles are assembled into nitride-bonded refractory end plates.
Filter assemblies are installed into properly configured cartridge filter furnaces
using special tools and wedge blocks. Preheat required for uniform priming
and thermal equilibrium is usually 24 - 30 hours for larger assemblies. Smaller
assemblies (7 tubes) may be adequately preheated in 16 hours or less. For
optimum priming and subsequent performance, preheat maximum temperature
soak should be 800° C (1472° F).
Pyrotek Inc. PAGe 1
MetAuLLIcs cArtrIdGe FILter (McF®)
FILter MedIA ProPertIes FILtrAtIon eFFIcIency
The pore diameters of bonded particle MCF® tube media are given in Figure 1 Filtration efficiency depends upon a
as a function of grit size. number of factors. The superiority of the
bonded particle MCF® is based upon its
pore structure and fineness, specific binder
system and large surface area provided by
the cartridge configuration. Factors such
as metal flow rate and inherent incoming
metal cleanliness also affect filtration
efficiency. generally, the 20 and 24 grit
filter grades are capable of removing 90%+
of 5 micron particulate and larger (* see
Page 1 note).
MCF® tubes are bundled into assemblies of 3
to 28 tubes. The assembly size is determined
by metal flow rate, grit size of the filter media,
throughput desired and quality expectations.
Figure 1 - Pore diameters Fine grits permit higher flow rates and higher
thoughput for a given tube bundle assembly.
Pore size distribution for the finest grits (20-24) show very good uniformity. Very fine grit sizes, provide the highest
results were obtained by computed tomography analysis (CaT Scan). filtration efficiency levels, with larger tube
assemblies necessary to accommodate the
specific casting flow rate and throughput
Filter life is dependant on many factors: alloy, melt stock, general melting and
furnace practices, performance of upstream degassing, and especially grain
refining practices. In general, Figure 2 demonstrates the nominal filter life that
is attainable with careful attention to all process parameters.
Figure 2 - anticipated nominal Filter Capacity
Pyrotek Inc. PAGe 2
MetAuLLIcs cArtrIdGe FILter (McF®)
MetAuLLIcs cArtrIdGe FILter tube bundLe APPLIcAtIons tube conFIGurAtIons AvAILAbLe
Standard Tube Flow Capabilities Per Tube standard tube size
Metaullics produces standard tube sizes
Very Fine grits 20-24: 25-40 lb/min/tube (15-20 kg/min/tube)
and assemblies which are compatible with
Fine grits 14-16: 50-150 lb/min/tube (20-70 kg/min/tube) competition. Custom sizes can be developed
Tube Bundle Filter Surface recommended Max anticipated Max and are available for other specific needs.
area Flow rate * Throughput **
MCF® Sq ft lb/min kg/min Metric Tons Metaullics Cartridge Filters are available in
3 9 120 55 300-500 the following tube bundle assemblies.
5 15 175 80 400-600 3, 5, 7, 9, 11, 14, 18, 22, 28
End plates are constructed from nitride-
7 21 250 115 500-700
bonded silicon carbide. wedge blocks
9 27 300 135 600-800 are cast from suitable molten aluminium-
11 33 400 180 700-900 resistant refractory compositions.
14 42 500 225 800-1000
18 54 740 336 900-1100
cArtrIdGe FILter FurnAces
22 66 880 400 1000-1200 Pyrotek Engineered Systems designs
28 84 1120 510 1100-1400 and builds filtration furnaces to house
* For very fine grits 20-24. the various size cartridge tube bundles.
resistance heating is employed (45-175/
** actual cartridge life will depend on a number of factors, including alloy, melt stock,
KVa depending on size), with full SCr
general melting and furnace practices, performance of upstream degassing, and especially
grain refining practices.
• refractory construction provides for
best heat insulation.
MetAuLLIcs cArtrIdGe FILter FLow rAte cAPAbILIty • Various inlet / outlet positioning
• Specific engineered approval drawings
are submitted after receipt of order
and before fabrication can begin.
lbs / min
• Full installation, operation and
kg / min
maintenance manuals are provided.
• Start-up assistance provided as
Figure 3 - Flow rate Capability
note: The physical and chemical properties listed represent typical, average values obtained in accordance with Product type: 124
accepted test methods and are subject to normal manufacturing variations. They are supplied as a technical
service and are subject to change without notice. commodity code: 05004
Pyrotek inc. • corPorate office • 9503 e. MontgoMery avenue, SPokane valley, Wa 99206, uSa • P: 509-926-6212 • f: 509-927-2408
www.pyrotek.info • email: firstname.lastname@example.org Jul-07-el-867